JP2002303358A - Double cavity toroidal type continuously variable transmission and method of assembling the same - Google Patents

Abstract

(57) [Problem] To provide a double-cavity toroidal-type continuously variable transmission that is less deformed even under load and can achieve high efficiency. A pair of input disks (4, 5) and a pair of output disks (7, 8) supported concentrically and independently rotatably inside a case (1) and a trunnion pivot are supported swingably. Yoke 1 fixed to the case
3a, 13b, a plurality of power rollers which are rotatably rolled between the input disk and the output disk and transmit power by friction, and are provided between the pair of output disks, and provide rotational movement of the output disk. Output gear 1 to be taken out
0 and a gear housing 51 for supporting the output gear, wherein the support post 14a for supporting the yoke 13a and the gear housing 51 are fixed to the case 1 via a rigid fixing member 52. And

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-cavity toroidal type continuously variable transmission used as a transmission for an automobile, for example, and a method of assembling the same.

[0002]

2. Description of the Related Art A double-cavity toroidal type continuously variable transmission used as, for example, an automobile transmission is known from, for example, Japanese Patent Application Laid-Open No. 2000-35099. This double-cavity toroidal type continuously variable transmission is configured as shown in FIGS. That is, case 1
The input shaft 2 is rotatably supported inside the. The input shaft 2 receives a rotational force from a drive shaft 3 via a pressing mechanism including a loading cam described later.

[0005] First and second input disks 4, 5 are supported by ball splines 6, respectively, at the portions near both ends of the input shaft 2, with the inner surfaces 4 a, 5 a facing each other. Therefore, the first and second input disks 4, 5
Are rotatably supported inside the case 1 concentrically and synchronously with each other. Also, the second input disk 5
Is supported by a loading nut 2b via a disc spring 2a.
5, a preload is applied.

[0004] First and second output disks 7 and 8 are supported via a sleeve 9 around an intermediate portion of the input shaft 2. The sleeve 9 has an output gear 10 integrally provided on an outer peripheral surface of an intermediate portion. The sleeve 9 has an inner diameter larger than the outer diameter of the input shaft 2. The input shaft 2 is rotatably supported concentrically.

The gear housing 11 comprises a pair of left and right support walls 11a and 11b, and a pair of support walls 11a and 11b.
And an annular space 11c that encloses the teeth of the output gear 10, the outer peripheral edge of which is engaged by a stepped engaging portion 11d. Further, a plurality of bolt holes 1 are provided in the stepped engagement portion 11d in the lateral direction (the same direction as the axial direction of the input shaft 2).
1e are drilled, and bolts 11e are inserted into these bolt holes 11e.
The gear housing 11 is fixed to the inner surface of the case 1 by bolts 11f.

A transmission gear 18 fitted on an output shaft 17 is meshed with the output gear 10, and the transmission gear 18 is also covered by the gear housing 11. The gear housing 11 is fixed to the valve body 1 by a fixing member 19.
6 fixed.

The first and second output disks 7, 8 are spline-engaged at both ends of a sleeve 9 with their inner surfaces 7a, 8a facing each other. Therefore, the first input disk 4 and the first output disk 7 have the inner surfaces 4a and 7a facing each other, and the second input disk 5 and the second output disk 8 have the inner surfaces 5a and 8a facing each other. It is rotatably supported in the state.

An upper yoke 13a and a lower yoke 13b are supported on the inner surface of the case 1 at lateral positions of the first and second output disks 7, 8 with both disks 7, 8 sandwiched from both sides. The upper yoke 13a and the lower yoke 13b are slightly displaceably supported by the support posts 14a, 14b.
The support post 14a has a plurality of bolts 1 on the inner surface of the case 1.
5 fixed. The support post 14b is fixed to the valve body 16 by a bolt 15. That is, the support posts 14a and 14b are fixed in the vertical direction (in the direction perpendicular to the axial direction of the input shaft 2) by the bolts 15.

The first and second support posts 14a and 14b are located between the inner surface 4a of the first input disk 4 and the inner surface 7a of the first output disk 7, respectively.
First, the second input disk 5 and the second output disk 8 are provided so as to face the second cavities 22 which are portions between the inner surface 5a and the inner surface 8a of the second output disk 8, respectively.

Therefore, the yokes 13a and 13b are supported by the support posts 14a and 14b, and
One end of each of 3a and 13b faces the outer peripheral portion of the first cavity 21, and the other end faces the outer peripheral portion of the second cavity 22, respectively.

Since the first and second cavities 21 and 22 have the same structure, only the first cavity 21 will be described. A pair of trunnions 30 are provided. Both ends of the trunnion 30 are the upper yoke 13a and the lower yoke 1
3b, it is supported so as to be swingable and displaceable in the axial direction.

A displacement shaft 31 is supported at an intermediate portion of the trunnion 30. The displacement shaft 31 has a support shaft 33 and a pivot shaft 34 which are parallel and eccentric to each other. The support shaft 33 is supported by the trunnion 30 via a radial needle bearing 35. A power roller 36 is supported around the pivot 34 via another radial needle bearing 38.

A pair of displacement shafts 31 provided for each of the first and second cavities 21 and 22 are provided.
Each of them is provided at a position 180 ° opposite to the input shaft 2 for every 1 and 22. Also, each support shaft 3 of the displacement shaft 31
4 is eccentric with respect to each support shaft 33,
And the second input disks 4 and 5 and the first and second output disks 7 and 8 have the same rotational direction. The eccentric direction is a direction substantially orthogonal to the direction in which the input shaft 2 is provided. Therefore, the power roller 36 is connected to the input shaft 2
And, it is supported so as to be slightly displaceable in the direction in which the transmission shaft 3 is arranged. As a result, the tendency of the power roller 36 to be displaced in the axial direction of the input shaft 2 due to a change in the amount of elastic deformation of the constituent members and the like based on a change in the torque transmitted by the double-cavity toroidal type continuously variable transmission. Even in the case of displacement, the displacement can be absorbed without applying excessive force to the constituent members.

Further, between the outer peripheral surface of the power roller 36 and the inner peripheral surface of the intermediate portion of the trunnion 30, a thrust ball bearing 39 and a thrust bearing 40 such as a slide bearing or a needle bearing are sequentially provided from the outer surface of the power roller 36. Is provided. Of these, the thrust ball bearing 39 allows the rotation of the power roller 36 while supporting the load in the thrust direction applied to the power roller 36. Further, the thrust bearing 40 allows the pivot shaft portion 34 and the outer ring 41 to swing about the support shaft portion 33 while supporting the thrust load applied to the outer ring 41 of the thrust ball bearing 39 from the power roller 36. .

A loading cam type pressing mechanism 45 is provided between the input shaft 2 and the first input disk 4. The pressing mechanism 45 is spline-engaged with an intermediate portion of the input shaft 2 and is supported in a state where displacement in the axial direction is prevented, and a cam plate 46 that rotates with the input shaft 2,
It comprises a plurality of rollers 48 rotatably held by a holder 47. Then, the first input disk 4 is rotated while being pressed against the second input disk 5 based on the rotation of the input shaft 2.

During operation of the double-cavity toroidal type continuously variable transmission configured as described above, the rotation of the input shaft 2 is transmitted to the first input disk 4 via the pressing mechanism 45 composed of a loading cam. The first input disk 4 and the second input disk 5 rotate in synchronization with each other. First
The rotation of the input disk 4 and the second input disk 5 of the first and second output disks 7 and
It is conveyed to 8. The rotation of the first and second output disks 7, 8 is transmitted by an output gear 10 and taken out by an output shaft 17 via a transmission gear 18.

When the rotational speed ratio between the input shaft 2 and the output gear 10 is changed, a pair of the first and second cavities 21 and 22 are respectively set based on switching of a control valve (not shown). A drive piston (not shown) is provided for each cavity 21 and 22 to displace the same distance in the opposite direction to each other.

Along with the displacement of the driving pistons, a total of four trunnions 30 are displaced in the opposite direction, and one power roller 36 is displaced downward and the other power roller 36 is displaced upward. As a result, the peripheral surface of each power roller 36 and the first and second input disks 4, 5
Inner surfaces 4a, 5a and first and second output disks 7,
The direction of the tangential force acting on the contact portion between the inner surface 8a and the inner surface 7a, 8a changes. Then, with the change in the direction of the force, the trunnion 30 swings in the opposite direction about the pivot axis pivotally supported by the upper yoke 13a and the lower yoke 13b. As a result, the peripheral surface of the power roller 36 and the first and second input disks 4 and 5 and the first and second output disks 7 and
8, the rotation speed ratio between the input shaft 2 and the output gear 10 changes.

The conventional double-cavity toroidal-type continuously variable transmission configured as described above is sandwiched between the first and second input disks 4 and 5 and the first and second output disks 7 and 8. Power is transmitted by the power roller 36. In addition, it is characterized by high power transmission and high efficiency.

However, the toroidal type continuously variable transmission has a tilt center of the trunnion 30 and the first and second input disks 4 and 4.
5 or the center of the radius of one of the first and second output disks 7 and 8 must be aligned. Therefore, in order to make the disc radial axis coincide with the tilt center axis of the trunnion 30, the respective positioning is performed with respect to the case 1.

That is, the center of the disk radius is adjusted by the gear housing 11 that supports the output gear 10 between the first and second output disks 7 and 8. In addition, trunnion 3
The tilt center of 0 is the upper yoke 13a and the lower yoke 13
The support posts 14a and 14b that support b are positioned with respect to the case 1. For this reason, the case 1 has a position for fixing the gear housing 11 and the support posts 14a,
It is necessary to precisely process the position where the 14b is fixed.

[0022]

However, in the conventional double-cavity toroidal type continuously variable transmission, the direction in which the gear housing 11 is fixed to the case 1 by the bolts 11f is the axial direction of the input shaft 2. The direction in which the support posts 14a and 14b are fixed to the case 1 and the valve body 16 by the bolts 15 is the upper and lower direction perpendicular to the axial direction of the input shaft 2.

Therefore, when the case 1 is processed, the processing is performed from the lower surface direction and the side surface direction of the cylindrical case 1. Further, the distance to the processing surface is long, and it is difficult to perform the processing with high precision, which leads to an increase in the processing cost of the case 1.

Further, a gear housing 11 for supporting the output gear 10 is fixed to the inner surface of the case 1 by bolts 11f. The support posts 14a and 14b of the upper yoke 13a and the lower yoke 13b for determining the position of the trunnion 30 are fixed to the case 1 and the valve body 16 by bolts 15.

Therefore, the bearing load of the ball bearing 12 supporting the output gear 10 acts on the gear housing 11, and is transmitted to the case 1 for fixing the gear housing 11. In order to reduce the weight of the double-cavity toroidal type continuously variable transmission, the case 1 is usually formed of aluminum in many cases. The strength of Case 1 is achieved. Accordingly, the structure of the case 1 for fixing the gear housing 11 becomes complicated, and when the portion for fixing the gear housing 11 becomes thick, the entire axial length of the toroidal transmission mechanism becomes longer, resulting in an increase in size. There is a problem.

In addition, when assembling each component to the case 1, it is usual that each component is sequentially assembled into the case 1 as shown in Japanese Patent Application Laid-Open No. H11-108139. However, since all the parts are assembled in the case 1, it is difficult to confirm the assembly in the middle until the assembly is finally completed. If assembly failure occurs after assembly is completed, it is necessary to remove each part from case 1 and reassemble. When such reassembly is performed, the traction surface of the disk or the power roller may be damaged, and sufficient performance may not be exhibited.

When the loading nut 2b is fixed at the end of the input shaft 2 to the back of the second input disk 4b via the disc spring 2a, it is necessary to appropriately set the compression amount of the disc spring 2a. is there. If the disc spring 2a is compressed too much from the design value, efficiency is reduced due to excessive pressing stress. Further, the stress of the disc spring 2a itself also increases, which causes breakage. Conversely, if the disc spring 2a is too wide than the designed value, the pressing force is insufficient, so that power cannot be transmitted between the disk and the power roller, causing slippage. Therefore, it is necessary to provide an appropriate clearance between the disc springs 2a. However, the operation in the case 1 is difficult because the space (hole diameter) is small due to the small space.

The present invention has been made in view of the above circumstances. It is an object of the present invention to accurately position and fix a toroidal transmission mechanism with respect to a case, and to process each part including the case. An object of the present invention is to provide a double-cavity toroidal-type continuously variable transmission that is easy and can reduce costs.

Another object of the present invention is to provide a method of assembling a double-cavity toroidal type continuously variable transmission in which a toroidal transmission mechanism can be efficiently assembled to a case.

[0030]

In order to achieve the above object, according to the present invention, a case and a pair of a case and a pair of rotatably supported concentrically and independently rotatably inside the case are provided inside the case. An input disk and a pair of output disks, and a trunnion having an even number of concentric or parallel pivots, which are present at a twist position perpendicular to the direction of the central axis of the input disk and the output disk.
A yoke for swingably supporting the pivot of the trunnion,
A plurality of power rollers that are rotatably rolled between inner surfaces of the input disk and the output disk and transmit power by friction in a state in which the trunnion is rotatably supported about a displacement axis, A double-cavity toroidal-type continuously variable transmission including an output gear provided between the pair of output disks and configured to take out the rotational movement of the output disk, and a gear housing supporting the output gear, supports the yoke. At least two or more members of the support post, the support post, and a plurality of members for fixing the gear housing to the case are connected or integrally formed with a member having rigidity.

A second aspect of the present invention provides a case, a pair of input disks and a pair of output disks rotatably supported concentrically and independently of each other inside the case, and a center of the input disk and the output disk. A trunnion having an even number of concentric or parallel pivots existing at a torsion position perpendicular to the axis direction, a yoke for swingably supporting the trunnion pivot, and a displacement axis for the trunnion. A plurality of power rollers that are rotatably rolled between inner surfaces of the input disk and the output disk and transmit power by friction while being rotatably supported as a center; and A double cavity provided between the output gear for taking out the rotational movement of the output disk and a gear housing for supporting the output gear. In formula toroidal continuously variable transmission, a first support post for supporting the yoke, the first
The first member for fixing the support post and the gear housing to the case and the second member for fixing the second support post for supporting a yoke different from the yoke have rigidity. It is characterized by being connected or integrally formed by members.

According to a third aspect of the present invention, the support post or the fixing member for fixing the support post to the case is fixed to a gear housing for supporting an output gear, and the fixing member is fixed to the case. It is characterized by being fixed.

A fourth aspect of the present invention is characterized in that all the support posts in the same cavity of the third aspect are integrally connected.

A fifth aspect of the present invention provides a case, a pair of input disks and a pair of output disks rotatably supported concentrically and independently of each other inside the case, and a center of the input disk and the output disk. A trunnion having an even number of concentric or parallel pivots existing at a torsional position perpendicular to the axis direction, a yoke for swingably supporting the trunnion pivot, and a displacement axis for the trunnion. A plurality of power rollers that are rotatably rolled between inner surfaces of the input disk and the output disk and transmit power by friction while being rotatably supported as a center; and A double cavity provided between the output gear for taking out the rotational movement of the output disk and a gear housing for supporting the output gear. In the method for assembling a toroidal-type continuously variable transmission, a support post that supports the gear housing including the output gear and the yoke is fixed to a rigid fixing member, and then the support post that supports the gear housing and the yoke. Is incorporated in a case together with the fixing member.

A sixth aspect of the present invention provides a case, a pair of input disks and a pair of output disks rotatably supported concentrically and independently of each other inside the case, and a center of the input disk and the output disk. A trunnion having an even number of concentric or parallel pivots existing at a torsional position perpendicular to the axis direction, a yoke for swingably supporting the trunnion pivot, and a displacement axis for the trunnion. A plurality of power rollers that are rotatably rolled between inner surfaces of the input disk and the output disk and transmit power by friction while being rotatably supported as a center; and A double cavity provided between the output gear for taking out the rotational movement of the output disk and a gear housing for supporting the output gear. In the method for assembling a toroidal-type continuously variable transmission, a support post that supports the gear housing including the output gear and the yoke is fixed to a rigid fixing member, and then the support post that supports the gear housing and the yoke. And a first step of assembling the input shaft together with the fixing member, and after attaching an input shaft to the output gear, first and second output disks, a trunnion equipped with a power roller and first and second power disks from both ends of the input shaft. And a second step of assembling a toroidal transmission mechanism such as a second input disk, and incorporating the toroidal transmission mechanism into the case, and measuring a distance between an outer surface of the fixed member and a disk rotation center of the toroidal transmission mechanism. A third step in which the center of rotation of the disk and the center of rotation of the drive shaft coincide with each other and are fixed to the case. To.

According to the first and second aspects, the support post for supporting the yoke and the plurality of members for fixing the support post to the case are connected or integrally formed with a rigid member, so that the position of each component is adjusted. The number of joints with the extension member is reduced, the deformation is small even when a load is applied, the efficiency can be improved, and the structure is simplified.

According to the third aspect, the support post for supporting the gear housing and the yoke is fixed to the case via a rigid member. Therefore, the gear housing receives the bearing load that supports the output gear, and the member that fixes the gear housing receives the load, and the case does not receive the load. As a result, it is not necessary to increase the strength of the case 1 by partially increasing the thickness of the part of the case where the gear housing is connected, and it is possible to simplify and reduce the thickness of the case.

According to the fourth aspect, since all the support posts in the same cavity are integrally connected, the rigidity can be further increased in addition to the first and second aspects.

According to the fifth and sixth aspects, by assembling the toroidal speed change mechanism and then assembling it into the case, it is possible to confirm the operation of the toroidal speed change mechanism before assembling the case.

[0040]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIGS. 1 and 2 show a first embodiment, in which an output gear 10 fitted to an input shaft 2 and having rotation transmitted from first and second output disks 7 and 8 and an output gear 10 therefor. The transmission gear 18 meshing with the gear 10 is provided in the gear housing 5.
1 supported. The gear housing 51 includes a pair of left and right support walls 51a and 51b.
1a and 51b, the output gear 10 and the transmission gear 18
Is provided with an annular space portion 51c for enclosing the tooth portion.

The outer peripheral edges of the upper portions of the support walls 51a and 51b are engaged by a stepped engaging portion 51d. Further, a bolt hole 51e is formed in the stepped engagement portion 51d in a vertical direction (a direction perpendicular to the axis of the input shaft 2). A bolt 54 inserted into the bolt through hole 53 of the first fixing member 52 is screwed into the bolt hole 51e, and the gear housing 51 is fixed to the first fixing member 52.

The first fixing member 52 is a rigid metal plate, and both ends of the first fixing member 52 are the first and second cavities 2.
It has been extended to 1,22. Support posts 14a for supporting the upper yoke 13a are connected to both ends of the first fixing member 52 by bolts or the like. Further, a plurality of bolt through holes 55 are provided in both ends of the first fixing member 52 in the vertical direction (perpendicular to the axis of the input shaft 2), and bolts 56 are inserted into these bolt through holes 55. The first fixing member 52 is fixed to the inner surface of the case 1.

Accordingly, the support post 14a for supporting the gear housing 51 and the upper yoke 13a is fixed to the inner surface of the case 1 via the first fixing member 52 having rigidity. Further, a spacer 57 for adjusting a distance L between the outer surface of the first fixing member 52 and the axis of the input shaft 2 is interposed between the first fixing member 52 and the case 1.

The support post 14b for supporting the lower yoke 13b is provided with a valve body 16 as a second fixing member.
Are connected by bolts or the like. An L-shaped fixed plate 58 is fixed to the left and right side surfaces at the lower portion of the gear housing 51 by bolts 59. The fixed plate 58 is
Is fixed to the lower surface of the device by bolts 60.

As described above, according to the first embodiment, the gear housing 51 and the support post 14a for supporting the upper yoke 13a are fixed to the inner surface of the case 1 via the rigid first fixing member 52. I have. Therefore, the gear housing 51 receives a bearing load for supporting the output gear 10,
The first fixing member 52 fixed to the gear housing 51 and the valve body 16 as the second fixing member receive the load, and the case 1 does not receive the load.

As a result, the gear housing 51 of the case 1
There is no need to partially increase the thickness of the case 1 by increasing the thickness of the case 1, so that the shape of the case 1 can be simplified and thinned, and the overall weight and weight of the toroidal transmission mechanism can be reduced. Can be shortened.

As shown in FIG. 2, the toroidal type continuously variable transmission has a tilt center BB of the trunnion 30 and the first and second input disks 4, 5 or the first and second output disks. It is necessary to match the center of one of the disc radii R of the first and second fixing members 52 and 71 with the first fixing member 52 and the valve body 1.
6 by fixing the support posts 14a and 14b to
There is no deformation even under load, there is no deviation between the disc radius R and the tilt center BB of the trunnion 30, the output gear 10 can be prevented from falling down, and the efficiency decreases even when transmitting large torque. Can be prevented.

In the first embodiment, the support post 14a supporting the upper yoke 13a is fixed to the first fixing member 52 by bolts, and the support post 14b supporting the lower yoke 13b is bolted to the valve body 16a. , But may be integrally formed. Further, as an output means to the output shaft, a belt transmission mechanism or a chain transmission mechanism other than a gear transmission mechanism such as an output gear can be used.

FIG. 3 shows a second embodiment, in which, in addition to the first embodiment, the support posts 14a, 14b in the first and second cavities 21, 22 are integrally connected by a connecting member 61. . According to this embodiment, since the upper and lower support posts 14a and 14b are integrally connected, there is an effect that the rigidity can be further increased.

FIG. 4 shows a third embodiment, and explains a method of assembling a toroidal transmission mechanism to a case in a manufacturing process of a double-cavity toroidal type continuously variable transmission. FIG. 4 shows a state before the toroidal speed change mechanism 62 is assembled to the case 1. First, a procedure for assembling the toroidal speed change mechanism 62 will be described.

The support walls 51a and 51b constituting the gear housing 51 are positioned on both sides of the output gear 10, and the stepped engagement portions 51c are engaged to oppose the mutually provided bolt holes 51d. Then, a bolt 54 is inserted into the bolt through hole 53 from the upper surface side of the first fixing member 52, and the bolt 54 is screwed into the bolt hole 51 d so that the gear housing 51 is inserted.
And the first fixing member 52.

The upper yoke 13a is connected to the first fixing member 52.
Incorporate in.

The input shaft 2 is fitted into the output gear 10, and first and second output disks 7, 8 are provided from both ends of the input shaft 2.
Are fitted together with the output gear 10.

The trunnion 30 (trunnion assembly) on which the power roller 36 is mounted is assembled.

First and second input disks 4 and 5 are assembled from both ends of the input shaft 2.

The lower yoke 13b is incorporated.

The valve body 16 to which the support post 14b is fixed is fitted to the pivot of the trunnion 30.

Fixing plates 58 are fixed to lower left and right side surfaces of the gear housing 51 by bolts 59, and the fixing plates 58 are fixed to the lower surface of the valve body 16 by bolts 60.

The distance L between the outer surface of the first fixing member 52 and the disk rotation center of the toroidal transmission mechanism 62 is measured, and
The thickness of the spacer 57 is determined, and the spacer 57 is interposed between the first fixing member 52 and the inner surface of the case 1. And
A bolt 56 is inserted into the bolt through hole 55 from below the first fixing member 52 to fix the first fixing member 52 to the inner surface of the case 1.

As described above, the toroidal speed change mechanism 62 assembled by the above is assembled into the case 1, but what is important here is that the center of rotation of the disk of the toroidal speed change mechanism 62 coincides with the center of rotation of the drive shaft 3. Need to be done. Therefore, the distance L between the outer surface of the first fixing member 52 and the disk rotation center of the toroidal transmission mechanism 62 is measured, and the disk rotation center and the rotation center of the drive shaft 3 are made to coincide.

When assembling the first and second input disks 4 and 5 from both ends of the input shaft 2, the input shaft 2
After fitting the disc spring 2a to the end of the case 1, it is necessary to tighten the loading nut 2b to properly set the amount of compression of the disc spring 2a. However, since the amount of tightening can be adjusted outside the case 1, the workability is improved. Are better.

[0063]

As described above, according to the first and second aspects, the support post for supporting the yoke and the plurality of members for fixing the support post to the case are connected or integrally formed by rigid members. This reduces the number of joints between each component and the positioning member, reduces deformation even when a load is applied, increases efficiency, and simplifies the structure. Therefore, it is possible to facilitate the processing of the case and to reduce the size and weight of the entire device.

According to the third aspect, even if the gear housing receives the bearing load for supporting the output gear, the member fixing the gear housing receives the load, and the case does not receive the load. As a result, it is not necessary to increase the strength of the case 1 by partially increasing the thickness of the part of the case where the gear housing is connected, and it is possible to simplify and reduce the thickness of the case.

According to the fourth aspect, since all the support posts in the same cavity are integrally connected, the rigidity can be further increased in addition to the first and second aspects.

According to the fifth and sixth aspects, by assembling the toroidal speed change mechanism and then assembling it in the case, it is possible to confirm the operation of the toroidal speed change mechanism before assembling the case.

[Brief description of the drawings]

FIG. 1 is a vertical side view of a double-cavity toroidal-type continuously variable transmission according to a first embodiment of the present invention.

FIGS. 2A and 2B show a double-cavity toroidal-type continuously variable transmission according to the embodiment, in which FIG.
Is a longitudinal side view of the trunnion.

FIG. 3 is a vertical side view of a double-cavity toroidal continuously variable transmission according to a second embodiment of the present invention.

FIG. 4 is a vertical side view of a toroidal transmission mechanism according to a third embodiment of the present invention.

FIG. 5 is a vertical side view of a conventional double-cavity toroidal-type continuously variable transmission.

FIG. 6 is a vertical sectional view of a conventional double-cavity toroidal type continuously variable transmission.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Case 2 ... Input shaft 4, 5 ... Input disk 7, 8 ... Output disk 10 ... Output gear 13a, 13b ... Yoke 14a, 14b ... Support post 16 ... Valve body 30 ... Trunnion 36 ... Power roller 51 ... Gear housing 52 ... Fixing members

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Takashi Imanishi 1-5-50 Kugenuma Shinmei, Fujisawa-shi, Kanagawa Japan Seiko Co., Ltd. F-term (reference) 3J051 AA03 BA03 BB02 BD01 BE09 CA05 CB07 EC00 FA02

Claims (6)

[Claims] 1. A case, a pair of input disks and a pair of output disks rotatably supported concentrically and independently of each other inside the case, and directions of central axes of the input disks and the output disks. A trunnion having an even number of pivots concentric or parallel to each other, a yoke for swingably supporting the pivots of the trunnions, and a rotation about a displacement axis about the trunnions. A plurality of power rollers that are rotatably rolled between inner surfaces of the input disk and the output disk and transmit power by friction in a freely supported state, and are provided between the pair of output disks. Double-cavity toroider, comprising: an output gear for extracting rotational motion of an output disk; and a gear housing for supporting the output gear. In a continuously variable transmission, at least two or more members of a support post for supporting the yoke, a plurality of members for fixing the support post and the gear housing to the case are connected or integrally formed with a member having rigidity. A double-cavity toroidal-type continuously variable transmission characterized by the following: 2. A case, a pair of input disks and a pair of output disks rotatably supported concentrically and independently of each other inside the case, and directions of central axes of the input disk and the output disk. A trunnion having an even number of concentric or parallel pivots, a yoke that swingably supports the trunnion, and a yoke that rotates about the displacement axis about the trunnion. A plurality of power rollers that are rotatably rolled between inner surfaces of the input disk and the output disk and transmit power by friction in a freely supported state, and are provided between the pair of output disks. Double-cavity toroider, comprising: an output gear for extracting rotational motion of an output disk; and a gear housing for supporting the output gear. A first support post for supporting the yoke, a first member for fixing the first support post and the gear housing to the case, and a first support for supporting a yoke different from the yoke. 2
A toroidal type continuously variable transmission, wherein at least two or more members of the second member for fixing the support post are connected or formed integrally with a member having rigidity. 3. The support post or a fixing member fixing the support post to the case is fixed to a gear housing supporting an output gear, and the fixing member is fixed to the case. The double-cavity toroidal-type continuously variable transmission according to claim 1 or 2. 4. The double-cavity toroidal continuously variable transmission according to claim 3, wherein all the support posts in the same cavity are integrally connected. 5. A case, a pair of input disks and a pair of output disks rotatably supported concentrically and independently of each other inside the case, and directions of central axes of the input disks and the output disks. A trunnion having an even number of concentric or parallel pivots, a yoke that swingably supports the trunnion, and a yoke that rotates about the displacement axis about the trunnion. A plurality of power rollers that are rotatably rolled between inner surfaces of the input disk and the output disk and transmit power by friction in a freely supported state, and are provided between the pair of output disks. Double-cavity toroider, comprising: an output gear for extracting rotational motion of an output disk; and a gear housing for supporting the output gear. In the method of assembling a continuously variable transmission, a gear housing including the output gear and a support post supporting the yoke are fixed to a rigid fixing member, and then the support post supporting the gear housing and the yoke is fixed. A method of assembling a double-cavity toroidal-type continuously variable transmission, wherein the method is incorporated into a case together with the fixing member. 6. A case, a pair of input disks and a pair of output disks rotatably supported concentrically and independently of each other inside the case, and directions of central axes of the input disks and the output disks. A trunnion having an even number of pivots concentric or parallel to each other, a yoke for swingably supporting the pivots of the trunnions, and a rotation about a displacement axis about the trunnions. A plurality of power rollers that are rotatably rolled between inner surfaces of the input disk and the output disk and transmit power by friction in a freely supported state, and are provided between the pair of output disks. Double-cavity toroider, comprising: an output gear for extracting rotational motion of an output disk; and a gear housing for supporting the output gear. In the method of assembling a continuously variable transmission, a gear housing including the output gear and a support post supporting the yoke are fixed to a rigid fixing member, and then the support post supporting the gear housing and the yoke is fixed. The first to be incorporated into the case together with the fixing member
And after the input shaft is assembled to the output gear, toroidal transmission mechanisms such as first and second output disks, trunnions equipped with power rollers, and first and second input disks from both ends of the input shaft. A second step of assembling the part, incorporating the toroidal transmission mechanism into the case, measuring the distance between the outer surface of the fixed member and the disk rotation center of the toroidal transmission mechanism, and determining the disk rotation center and the rotation center of the drive shaft. A method of assembling a double-cavity toroidal-type continuously variable transmission, the method including a third step of matching and fixing to the case.